Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

As of September, 2018, Firefox no longer offers a version which
supports NPAPI, the technology required to run Java applets. The
Java Plugin for web browsers relies on the cross-platform plugin
architecture NPAPI, which had been supported by all major web
browsers for over a decade. The 64 bit version of Firefox has
never supported NPAPI, and Firefox version 52ESR is the last
release to support the technology. It is below the security
baseline, and no longer supported.